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API Std 670 6th edition

Machinery Protection Systems
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This standard covers the minimum requirements for a machinery protection system (MPS) measuring radial shaft vibration, casing vibration, shaft axial position, shaft rotational speed, crosshead vibration, piston rod monitoring, phase reference, crank angle reference, overspeed, surge detection, and critical machinery temperatures (such as bearing metal and motor windings). It covers requirements for hardware (transducer and monitor systems), installation, documentation, and testing.
SDO API: American Petroleum Institute
Document Number 670
Publication Date July 1, 2025
Language en - English
Page Count 225
Revision Level 6
Supercedes
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